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Decreased photosynthesis in the erect panicle 3 (ep3) mutant of rice is associated with reduced stomatal conductance and attenuated guard cell development

González-Carranza, Zinnia H.; Yu, Hongyang; Murchie, Erik H.; Gonzalez-Carranza, Zinnia H.; Pyke, Kevin A.; Roberts, Jeremy A.

Authors

Zinnia H. González-Carranza

Hongyang Yu

Erik H. Murchie

Kevin A. Pyke

Jeremy A. Roberts



Abstract

The ERECT PANICLE 3 gene of rice encodes a peptide that exhibits more than 50% sequence identity with the Arabidopsis F-box protein HAWAIIAN SKIRT (HWS). Ectopic expression of the Os02g15950 coding sequence, driven by the HWS (At3g61950) promoter, rescued the hws-1 flower phenotype in Arabidopsis confirming that EP3 is a functional orthologue of HWS. In addition to displaying an erect inflorescence phenotype, loss-of-function mutants of Os02g15950 exhibited a decrease in leaf photosynthetic capacity and stomatal conductance. Analysis of a range of physiological and anatomical features related to leaf photosynthesis revealed no alteration in Rubisco content and no notable changes in mesophyll size or arrangement. However, both ep3 mutant plants and transgenic lines that have a T-DNA insertion within the Os02g15950 (EP3) gene exhibit smaller stomatal guard cells compared with their wild-type controls. This anatomical characteristic may account for the observed decrease in leaf photosynthesis and provides evidence that EP3 plays a role in regulating stomatal guard cell development.

Journal Article Type Article
Publication Date 2015-03
Journal Journal of Experimental Botany
Print ISSN 0022-0957
Electronic ISSN 0022-0957
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 66
Issue 5
Pages 1543-1552
APA6 Citation González-Carranza, Z. H., Yu, H., Murchie, E. H., Gonzalez-Carranza, Z. H., Pyke, K. A., & Roberts, J. A. (2015). Decreased photosynthesis in the erect panicle 3 (ep3) mutant of rice is associated with reduced stomatal conductance and attenuated guard cell development. Journal of Experimental Botany, 66(5), 1543-1552. https://doi.org/10.1093/jxb/eru525
DOI https://doi.org/10.1093/jxb/eru525
Keywords Arabidopsis, ERECT PANICLE3, F-box protein, guard cell, HAWAIIAN SKIRT, photosynthesis, rice, stomatal
conductance
Publisher URL http://jxb.oxfordjournals.org/content/66/5/1543.full
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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